In desperate need of help!!!!

I have a 2001 golf gt tdi 130 and am having all sorts of cooling problems.
Whenever I push the car the temp guage rockets up. I have just changed the water pump, tensioner, cambelt and thermostat. All has had no effect on the cooling, if anything it has made it slightly worse. I have noticed the top hose from the rad it hot but the hose coming from the thermostat is staying cold with it only getting slightly warm by the thermostat housing. All of this after a good run.

I am open to any ideas as I feel like driving the car off a cliff!!!!